FredMcD replied to my Bing problem with Firefox, but sadly despite trying several ways as soon as I click on add-on my page just goes blank. Tools add-on same blank page, same with Firefox page click on the three lines scroll down to add on blank screen comes up. When I googled this problem there were several videos that stated it was a virus, I have Malwarebytes premium so I have also contacted them for their assistance. Bing or any other of the sites listed SafeSearch etc. none are listed in my files list so nothing to delete. Is it worth deleting Firefox and then next day download it fresh, or is the bad add-on just lurking ready to attach itself again.